Governor for internal-combustion engines



Aug., 7, 1945.

M. MALLORY GOVERNOR FOR INTERNAL-OMBUSTION ENGINES Filed 0G13. 9, 1944 YINVENTOR. BY z u I l l l h #figg/MVS.

Paresd Aug. vi', 1945 UNITED STATES PATENT lori-ICE GOVERNOR FORINTERNAL-COMBUSTION ENGINES 9 Claims.

vinternal combustion engine, and in particular to a governor for aninternal combustion engine which is operated by a suction deviceconnected into the intake manifold and provided with an air bleed whichis controlled by a centrfugally unbalanced valve rotated in accordancewith the engine speed. Such a governor is shown in my copendingapplication Serial No. 466,961, filed November 25, 1942. In someinstances, instead of air bleeding the suction device directly toatmosphere, it has been considered desirable to air bleed into theintake passageway under the air cleaner and on the atmosphere side ofthe governor valve to prevent dirt and dust from going into the engine.Since al1 air cleaners offer some restriction to the air flow into theintake passageway, a vacuum or suction is present in the intakepassageway and therefore the suction device cannot be bled down toatmospheric pressure or bled down to as low pressure as is possible whenthe air bleed is directly to atmosphere. If the vacuum or suction in thesuction device cannot be eliminated, the governor valve will notcompletely open.

It is the object of this invention to produce an engine governor of theabove described type wherein the suction device can be air bled into theintake passageway beneath the air cleaner and which will functionsatisfactorily to control the speed of the engine at the desiredgoverned speed.

Fig. 1 is a View partly in section showing my engine governor with theair bleed connected into the intake passageway beneath the air cleaner.

The parts of my governor are referenced as follows: engine intakemanifold I., intake passageway 2, air cleaner 3, governor valve 4 of thebutterfly type. crank arm 5 xed on valve shaft 6, tension spring 1connected to crank arm 5 and tending to open valve 4, a suction actuateddevice comprising a housing 8 divided by flexible diaphragm 9 intochambers I0 and II, rod I2 connecting diaphragm 9 to crank arm 5,conduit I3 connecting suction chamber III into the intake passageway 2on the engine or outlet side of valve 4. conduit I4 connecting conduitI3 into the venturi AI5 in intake passageway 2, conduit I6 connectingsuction chamber II! at all times with passageway I1 in the enginedistributor shaft I8, centrifugal valve housing I9 which rotates withshaft I8, valve cylinder 20 communieating at all times with passagewayI1, centrifugally unbalanced piston valve 2| reciprocably mounted incylinder 20, air bleed orifice 22 controlled by centrifugally unbalancedvalve 2|, tension spring 23 tending to oppose closing of'valve 2|,passageway 24 in valve 2| permitting restricted air flow between orice22 when open and passageway I1, conduit 25 connecting the sealeddistributor housing 26 with intake passageway 2. The inlet end 21 ofconduit 25 is preferably turned upwardly directly into the air ow.Conduit 28 connects conduit 25 with chamber '|I.a Chamber I| is a sealedchamber and communicates with atmosphere only through conduits 28, 25,intake passageway 2 and air cleaner 3. Manually operated throttle valve3U which may be omitted if desired.'

The operation of my device is as follows: As shown in the drawing, theengine has attained its governed speed, centrifugal valve 2|' has Iclosed or throttled air bleed orifice 22 so that the intake passagewaysuction on the engine side of valve 4 has drawn flexible diaphragm 9 tothe right and closed governor throttle valve 4. If the load on theengine is increased, the engine speed will slow down slightly causingspring 23 to open centrifugal valve 2| thereby permitting air to flowfrom intake passageway 2 through conduit 25, orifice 22, passageway I1and conduit I6 into chamber I0, thereby increasing the pressure inchamber I0 which permits spring 1 to move Valve 4 toward open position.As valve 4 moves toward open position a greater charge is admittedthrough air cleaner 3 and through intake passageway 1. The farther thatgovernor valve 4 is opened, the greater the charge admitted throughintake passageway 2, and since air cleaner 3 will offer some restrictionto air ow there will be an appreciable vacuum or suction created atorice 21 which will prevent the vacuum in chamber I0 from beingabsolutely eliminated. However, since this suction or vacuum obtainingon the atmosphere side of valve 4 and also created by air ow past inlet21 is imposed through conduits 25 and 28 upon chamber this vacuum willcompensate or counterbalance the inability of the centrifugallycontrolled air bleed 25, 2|, I1 and 26 to bleed down suction chamber I0to atmospheric pressure. In other vwords, this vacuum or suction imposedupon chamber assists the leftward movement ofv diaphragm 9 and assistsspring 1 to completely open governor valve 4 if load conditions call fora complete opening of the throttle governor valve. Thus, by sealing oifchamber II and imposingthe same vacuum on chamber II as air bleed inlet21 acting through conduits 25,

orifice 22 and conduits I1, I6 imposes upon suction chamber i0, I havecompletely negatlved the otherwise harmful eilect oi' air bleedingsuction chamber l into the intake passageway beneath the air cleanerrather than directly to atmosphere. It is obvious that if conduit 28were eliminated and chamber Il was open to atmosphere that the valve 4would never completely open because of the inability of air bleed inlet21 to completely eliminate the vacuum or suction in chamber I0.

I claim:

1, In an internal combustion engine having an intake passageway, agovernor valve for controlling the flow of motive lluid through saidpassageway, fluid pressure actuated means connected to said governorvalve for imparting movement to the same, a conduit connecting one sideof said pressure actuated means into the intake passageway on the engineside of said governor valve, an air bleed for the same side of saidpressure actuated means into the intake passageway on the atmosphereside of said governor valve, means for controlling said air bleed inaccordance with engine speed and tending to close said air bleedwhenever the engine attains a predetermined desired governed speed, anda conduit connecting the other side of the pressure actuated means intothe intake passageway on the atmosphere side of said governor valvewhereby any vacuum obtaining in the intake passageway in the vicinity ofthe air bleed is imposed upon both sides of said pressure actuated meansand cancels itself out and the pressure actuated means can move thegovernor valve to wide open position whenever the speed controlled meansopens said air bleed.

2. In an internal combustion engine having an intake passageway, agovernor valve for controlling the flow of motive fluid through saidpassageway, uid pressure actuated means connected to said governor valvefor imparting movement to the same, a conduit connecting one side ofsaid pressure actuated means into the intake passageway on the engineside of said governor valve, an air bleed for the same side of saidpressure actuated means into the intake passageway on the atmosphereside of said governor valve, centrifugally controlled valve means forcontrolling said air bleed in accordance with engine speed and-tendingto close said air bleed whenever the engine attains a predetermineddesired governed speed, and a conduit connecting the other side of thepressure actuated means into the intake passageway on the atmosphereside of said governor valve whereby any vacuum obtaining in the intakepassageway in the vicinity of the air bleed is imposed upon both sidesof said pressure actuated means and cancels itself out and the pressureactuated means can move the governor valve to wide open positionwhenever the speed controlled means opens said air bleed.

3. In an internal combustion engine having an intake passageway, agovernor valve for controlling the flow of motive fluid through saidpassageway, two substantially air-tight chambers, a movable wallseparating said chambers and responsive to fluid pressure differences inthe said chambers, a connection between said pressure actuated wall andthe governor valve for imparting movement thereto, a conduit connectingone of said chambers into the intake passageway on the engine side ofsaid governor valve, an air bleed for said last mentioned chamberintothe intake passageway on the atmosphere side of said governor valve,means for controlling said air bleed in accordance with engine speed andtending to close said air bleed whenever the engine attains apredetermined desired governed speed, and a conduit connecting the otherof said chambers into the intake passageway on the atmosphere side ofsaid governor valve whereby any vacuum obtaining in the intakepassageway in the vicinity of the air bleed is established in bothchambers when the speed control means opens the air bleed and thepressure actuated wall can move the governor valve to open position.

4. In an internal combustion engine having an' intake passageway, agovernor valve for controlling the flow of motive fluid through saidpassageway, uid pressure actuated means connected to said governor valvefor imparting movement to the same, a conduit connecting one side ofsaid pressure actuated means into the intake passageway on the engineside of said governor valve, an air bleed for the same side of saidpressure actuated means into the intake passageway on the atmosphereside of said governor valve, a centrifugally unbalanced valve forcontrolling said air bleed in accordance with engine speed and tendingto close said air bleed whenever the engine attains a predetermineddesired governed speed, said centrifugal valve constituting its owncentrifugal weight for unbalancing the same, and a conduit connectingthe other side of the pressure actuated means into the intake passagewayon the atmosphere side of said governor valve whereby any vacuumobtaining in the intake passageway in the vicinity of the air bleed isimposed upon both sides of said pressure actuated means and cancelsitself out and the pressure actuated means can move the governor valveto wide open position whenever the speed controlled means opens said airbleed.

5. In an internal combustion engine having an intake passageway, agovernor valve for controlling the flow of motive iluid through saidpassageway, fluid pressure actuated means comprising a substantiallyair-tight housing and a flexible diaphragm dividing said housing intotwo chambers, a connection between said flexible diaphragm and thegovernor valve for imparting movementto the governor Valve, a conduitconnecting one of said chambers into the intake passageway on the engineside of said governor valve whereby the suction obtaining in the intakepassageway on the engine side of said governor valve is imposed on theilexible diaphragm for closingr said governor valve, an air bleed forsaid last mentioned chamber into the intake passageway on the atmosphereside of said governor valve, means for controlling said air bleed inaccordance with engine speed and tending to close saidair bleed wheneverthe engine attains a predetermined desired governed speed whereby theintake passageway'suction is established in said chamber and causes saiddiaphragm to move said governor valve toward closed position, and aconduit connecting the other of said chambers into the intake passagewayon the atmosphere side of said governor valve whereby any vacuumobtaining in the intake passageway in the vicinity of the air bleed isestablished in both of said chambers when the speed controlled meansopens said air bleed and the pressure actuated means can open thegovernor valve.

6. In an internal combustion engine having an intake passageway, agovernor valve for controlling the flow of motive fluid through saidpassageway, iluid pressure actuated means comprising a substantiallyair-tight housing and a flexible diaphragm dividing said housing intotwo 2,381,131 chambers, a connection between said flexiblediacommunication whenever the engine attains a predetermined desiredgoverned speed, and a conduit connecting the other side of the pressureactuated means into the intake passageway on the atmosphere side of saidgovernor valve whereby any vacuum obtaining in the intake passageway onthe atmosphere side of the governor valve will be established in bothsides of said pressure acl tuated means and cancel itself out and `thepreson the atmosphere side of said governor valve,

means for controlling said air bleed in accordance with engine speed andtending to close said air bleed whenever the engine attains apredetermined desired governed speed whereby the intake passagewaysuction is established in said chamber and causes said diaphragm to movesaid governor valve toward closed position, and a conduit connecting theother of said chambers into the intake passageway on the atmosphere sideof said governor valve whereby any vacuum obtaining in the intakepassageway in the vicinity of the air bleed is established in both ofsaid chambers when the speed controlled means opens said air bleed andsaid resilient means can open the governor valve. l

7. In an internal combustion engine having an intake passageway, agovernor valve for controlling the flow of motive fluid through saidpassageway, fluid pressure actuated means connected to said governorvalve for imparting movement to the same, a conduit connecting one sideof said pressure actuated means into the intake passageway on the engineside of said governor valve, a rotary valve housing rotated inaccordance with the engine speed, a conduit connecting said rotaryhousing with the last mentioned side of said pressure actuated means, aconduit connecting said housing with the intake passageway on theatmosphere side of said governor valve, a centrifugally unbalanced valvereciprocably mounted in said valve housing for controlling communicationbetween said last two mentioned conduits and tending to close said sureactuated means can move the governor valve to open position whenever thespeed controlled centrifugal valve is open.

8. In an internal combustion engine having an intake passageway, agovernor valve for controlling the ow of motive fluid through saidpassageway, an air cleaner connected to said intake passageway on theatmosphere side of said governor valve, fluid pressure actuated meansconnected to said governor valve for imparting movement to the same, aconduit connecting. one side of said pressure actuated means into theintake passageway between the governor valve and said engine, an airbleed for the same side of said pressure actuated means into the intakepassageway between said air cleaner and the said governor valve, meansfor controlling said air bleed in accordance with enginespeed andtending to close said air bleed whenever the engine attains apredetermined desired governed speed wherebythe pressure actuated meansresponds to move said governor valve toward closed position, and aconduit connecting the other side of the pressure actuated means intothe intake passageway between the air cleaner and .the governor valvewhereby any vacuum obtaining in the intake passageway in the vicinity ofthe air bleed is imposed upon both sides of said pressure actuated meansand cancels itself out and the pressure actuated means can move thegovernor valve to wide open position whenever the speed controlled meansopens said air bleed.

9. The combination as set forth in claim 1 including a restriction tofluid ow located adjacent the inlet end of said intake passageway.

MARION MALLORY.

